[Iaxclient-cvs] SF.net SVN: iaxclient: [1269] branches/team/mihai/echocan/lib/audio_encode. c

[<sb...@us...>]

Revision: 1269
          http://iaxclient.svn.sourceforge.net/iaxclient/?rev=1269&view=rev
Author:   sbalea
Date:     2007-11-05 11:46:58 -0800 (Mon, 05 Nov 2007)

Log Message:
-----------
Update the VAD probability setup code.
Speex changed the interface to this functionality, so our code no longer made 
sense.
We also change the probability values: it appears that best result are obtained
when using speex default values.  I am leaving the code in though, so we know
where and what to tweak in case we need to.

Modified Paths:
--------------
    branches/team/mihai/echocan/lib/audio_encode.c

Modified: branches/team/mihai/echocan/lib/audio_encode.c
===================================================================
--- branches/team/mihai/echocan/lib/audio_encode.c	2007-11-05 19:42:15 UTC (rev 1268)
+++ branches/team/mihai/echocan/lib/audio_encode.c	2007-11-05 19:46:58 UTC (rev 1269)
@@ -109,7 +109,6 @@
 static void set_speex_filters()
 {
 	int i;
-	//float f;
 
 	if ( !st )
 		return;
@@ -123,11 +122,15 @@
 	i = (iaxci_filters & IAXC_FILTER_DEREVERB) ? 1 : 0;
 	speex_preprocess_ctl(st, SPEEX_PREPROCESS_SET_DEREVERB, &i);
 	
-	/* make vad more sensitive */
-	//f = 0.30f;
-	//speex_preprocess_ctl(st, SPEEX_PREPROCESS_SET_PROB_START, &f);
-	//f = 0.07f;
-	//speex_preprocess_ctl(st, SPEEX_PREPROCESS_SET_PROB_CONTINUE, &f);
+	/*
+	* We can tweak these parameters to play with VAD sensitivity.
+	* For now, we use the default values since it seems they are a good starting point.
+	* However, if need be, this is the code that needs to change
+	*/
+	i = 35;
+	speex_preprocess_ctl(st, SPEEX_PREPROCESS_SET_PROB_START, &i);
+	i = 20;
+	speex_preprocess_ctl(st, SPEEX_PREPROCESS_SET_PROB_CONTINUE, &i);
 }
 
 static void calculate_level(short *audio, int len, float *level)


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